How to fix your Samsung Galaxy S7 that started shutting off, restarting randomly [Troubleshooting Guide]

Random shutdowns and reboots can be due to a problem with the battery or some of the components inside your Samsung Galaxy S7. It could also be a sign of a serious firmware issue that needs your immediate attention. In other words, just by having these signs don’t give us a clue as to what the problem really is that’s why we need to do some troubleshooting procedures so that we can, at least, have an idea the cause or the trigger.

In this post, I will help you troubleshoot your Galaxy S7 that randomly reboots or shuts off. We will take a look at every possibility and rule them out one by one until we can arrive at a point where we can easily determine what the problem is all about. So, if you have a phone like this and are currently haunted by a similar issue, continue reading below as this post maybe helpful for you.

But before we jump right into our troubleshooting, if you have other issues with your phone, make sure to drop by our troubleshooting page for we have already addressed hundreds of problems with this device since it was released. Find issues that are similar with yours and use the solutions and/or troubleshooting guides we suggested. If they don’t work or if you need further assistance, feel free to contact us by filling up our Android issues questionnaire.

How to troubleshoot Galaxy S7 that randomly turns off and reboots

Problem: My Samsung Galaxy S7 has been randomly shutting off and restarting lately. Also when the phone is plugged in and I hold down the power button in attempt to turn it on it just flashes a charging symbol. I’m only able to turn it on once I remove the power cord even though the phone is charged above 20%.

Solution: If your phone shuts down and reboots without apparent reason, there are two factors need to consider that triggered the issue, either it is the firmware was ruined or the hardware itself has the problem. So, in order for you to determine what caused the issue the best thing that we want you to do is to rule-out the problem by performing the troubleshooting procedures. But nothing to worry about the methods because it won’t delete your important files or harm your phone. These are the methods that you should perform:

Step 1: Verify if the battery is defective by charging the device

In this particular method we have to verify if the battery is defective or not by charging it until it is full. Usually, due to battery inconsistencies and could not power up the hardware components that may be the reason that your phone shuts down and reboots without any clue. When it is already full do not disconnect it from the charger and use the device again and observe if the issue still occurs. If the problem still persists, then all you need to do is to bring it to the shop so that the technician can check the device. But before you do so, we recommend you to perform first the troubleshooting procedures to eliminate the suspicion that it is not the software-problem triggered it.

Step 2: Boot your phone in Safe mode

While connected to the charger, try restarting your phone in safe mode to know if a culprit caused the issue. In this android environment, the third-party apps will be deactivated and only the pre-installed will run in the system. So, while in this mode and your phone is not anymore shuts down and restarting, then there’s an app you need to find and uninstall it if possible. To do this, follow these steps:

Press and hold the Power key.
When Samsung Galaxy S7 logo appears, release the Power key and immediately hold the volume down key.
Continue holding the Volume Down key until it finishes its rebooting.
When “Safe mode” appears on the screen immediately release the Volume Down key.

But if nothing’s change and your phone still shuts off and reboots, you can move to the next method.

Step 3: Try Clearing the System Cache Partition

The system caches are temporary files that your phone had been created and stored in the directory of the device to make it run smoothly and efficiently. So, if these caches were ruined or outdated there is a possibility that inconsistencies will occur on your device without apparent reason. While in this method all old files will be deleted from the partition so that the device can create newer and fresher caches. But don’t you worry all your important files and data won’t be removed. This is how you delete the system caches:

Turn off the phone.
Press and then hold the Home and Volume UP keys, then press and hold the Power key.
When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
Once highlighted, you may press the Power key to select it.
Now highlight the option ‘Yes’ using the Volume Down key and press the Power button to select it.
Wait until your phone is finished wiping the cache partition.Once completed, highlight ‘Reboot system now’ and press the Power key.
The phone will now reboot longer than usual.

Step 4: Reset the device

Remember, you can do the reset if all procedures fail to resolve the issue of your phone. This will erase all files and data stored on your device including those apps that you had been downloaded from Play Store. Meaning, you will bring it back the system to its factory default and before you do so, we recommend that you should create a backup by transferring all of it to your computer or SD card.

Turn off your Samsung Galaxy S7.
Press and then hold the Home and Volume UP keys, then press and hold the Power key.
When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
Using the Volume Down key, navigate through the options and highlight ‘wipe data / factory reset.’
Once highlighted, you may press the Power key to select it.
Now highlight the option ‘Yes — delete all user data’ using the Volume Down key and press the Power button to select it.
Wait until your phone is finished doing the Master Reset. Once completed, highlight ‘Reboot system now’ and press the Power key.
The phone will now reboot longer than usual.

After the reset, observe closely if the issue still persists. If so, the best thing that you should do is to visit the nearest shop in your place so that the technician can check it for you.

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